Switched (e.g., On-off Control) Patents (Class 323/271)
  • Patent number: 9407149
    Abstract: A buck converting controller, adapted to control a DC-DC buck converting circuit to convert an input voltage into an output voltage, is disclosed. The buck converting controller comprises a feedback control circuit, an off-time determination circuit and a load control circuit. The feedback control circuit turns on and off a high-side transistor and a low-side transistor of the DC-DC buck converting circuit in response to a feedback signal indicative of the output voltage. The off-time determination circuit determines a preset off-time period according to the input voltage and the output voltage and generates an off notice signal according to the preset off-time period. The load control circuit is coupled to the DC-DC buck converting circuit and determines whether to release an electronic energy stored in the DC-DC buck converting circuit according to the off notice signal.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: August 2, 2016
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Li-Min Lee, Chao Shao, Zhong-Wei Liu
  • Patent number: 9407144
    Abstract: A current mode control buck-boost converter with improved performance utilizes separate buck and boost pulses. The buck-boost converter utilizes a buck/boost decision method with continuous control voltage for buck and boost mode, therefore eliminating transients in the control loop between operation modes and preventing voltage overshoots. If switching in Boost mode and the buck duty cycle is smaller than a set duty cycle, then in the next cycle Buck mode switching will occur. It is possible to track a Buck comparator output and the related duty cycle during Boost mode operation. Thus a mode change decision will only be dependent on a single input. A control loop will incorporate a single loop filter and error amplifier, wherein control voltages for Buck comparator and Boost comparator will be related.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: August 2, 2016
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Kemal Ozanoglu, Selcuk Talay, Pier Cavallini, Dieter Graefje, Andrea Acquas
  • Patent number: 9401356
    Abstract: A power circuit, control method, power system, and package structure of power circuit are disclosed. The power circuit includes a quasi-cascade power unit. The quasi-cascade power unit includes a normally-on switch, normally-off switch, control unit, first switch unit and second switch unit. The normally-off switch is electrically connected to the normally-on switch in series. The first end and the third end of the control unit are electrically connected to the control end of the normally-off switch and the control end of the normally-on switch, respectively. The first end and the second end of the first switch unit are electrically connected to the control end of the normally-on switch and the second end of the normally-off switch, respectively. The first end and the control end of the second switch unit are electrically connected to the second end of the control unit and the second end of the normally-on switch, respectively.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: July 26, 2016
    Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Jian-Hong Zeng, Fang Luo
  • Patent number: 9395775
    Abstract: A system for managing changes in current demand, including one or more processors, a memory coupled to at least one of the processors, a clock generation circuit coupled to the memory and configured to output a clock, one or more functional blocks, a power supply, configured to output a plurality of voltage levels, and a power management unit. The power management unit may be configured to set the power supply output to a first voltage level and then detect indications of an impending change in current demand within the SoC. If an indication of an impending change in current demand is detected, then the power management unit may be configured to adjust the power supply output to a second voltage level. After determining the impending change in current demand has occurred, the power management unit may be configured to adjust the power supply output back to the first voltage level.
    Type: Grant
    Filed: June 25, 2013
    Date of Patent: July 19, 2016
    Assignee: Apple Inc.
    Inventors: Toshinari Takayanagi, Jung Wook Cho, Patrick D. McNamara
  • Patent number: 9377796
    Abstract: The invention relates to a switched mode power supply comprising at least one switch and at least one inductor, the at least one switch being arranged to connect one terminal of the at least one inductor to one of a plurality of supply voltages, the other terminal of the at least one inductor providing a supply output, and further comprising a capacitor connected in parallel with the at least one inductor.
    Type: Grant
    Filed: July 9, 2013
    Date of Patent: June 28, 2016
    Assignee: QUALCOMM Incorporated
    Inventor: Martin Paul Wilson
  • Patent number: 9362903
    Abstract: An electronic component includes a switching device comprising a source, a gate, and a drain, the switching device having a predetermined device switching rate. The electronic component further includes a gate driver electrically connected to the gate and coupled between the source and the gate of the switching device, the gate driver configured to switch a gate voltage of the switching device at a gate driver switching rate. The gate driver is configured such that in operation, an output current of the gate driver cannot exceed a first current level, wherein the first current level is sufficiently small to provide a switching rate of the switching device in operation to be less than the predetermined device switching rate.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: June 7, 2016
    Assignee: Transphorm Inc.
    Inventors: Yifeng Wu, Liang Zhou, Zhan Wang
  • Patent number: 9337733
    Abstract: A voltage converting device includes a feedback module, for generating a comparing signal according to a feedback voltage and a reference voltage; a pulse-width-modulation module, for generating a driving signal according to comparing signal; a voltage-converting module including a low-side switch for controlling a connection between a node and ground according to driving signal, a high-side switch for controlling a connection between the node and an output end according to a control signal, an inductor coupled between the node and an input end, a feedback-voltage-generating unit for generating feedback voltage according to an output voltage of output end and a ratio, an adaptive current-generating unit for generating a current signal according to an adjusting signal, and a control unit for selecting driving signal or current signal as the control signal according to output voltage and an input voltage; and a current-adjusting module for generating adjusting signal according to comparing signal.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: May 10, 2016
    Assignee: Anpec Electronics Corporation
    Inventor: Chih-Ning Chen
  • Patent number: 9335772
    Abstract: A hold-up circuit coupled to a first node to receive an input voltage and to provide a hold-up voltage includes an inductor, a constant on-time buck-boost control circuit configured to drive a high-side power switch and a low-side power switch to operate in a buck mode and a boost mode of operation, and an energy storage capacitor. When the input voltage is greater than a predetermined threshold, the buck-boost control circuit is configured to drive the power switches in the boost mode to charge the capacitor to a capacitor voltage greater than the input voltage. When the input voltage is less than the predetermined threshold, the buck-boost control circuit is configured to drive the power switches in the buck mode to supply the energy stored on the capacitor to the inductor to provide a regulated voltage less than the capacitor voltage as the hold-up voltage to the first node.
    Type: Grant
    Filed: January 12, 2015
    Date of Patent: May 10, 2016
    Assignee: Micrel, Inc.
    Inventor: Martin F. Galinski, III
  • Patent number: 9323302
    Abstract: According to one embodiment, a system is provided that includes at least one power gated component and two or more power switch transistors configured to provide one or more conductive paths between a common power supply rail, the at least one power gated component, and a ground. The two or more power switch transistors each include a source terminal, a drain terminal, and a gate terminal configured to control current flow between the source and drain terminals. The system also includes a rotating voltage control coupled to the gate terminals and configured to apply a sequence of control signals rotating between an on-state and an off-state to each of the gate terminals while the at least one power gated component is turned on. A switch activation ratio level is programmable to set a number of power switch transistors in the on-state relative to a total number of power switch transistors.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: April 26, 2016
    Assignee: International Business Machines Corporation
    Inventors: Pradip Bose, Alper Buyuktosunoglu, Hans M. Jacobson, Victor Zyuban
  • Patent number: 9306451
    Abstract: A switch mode power supply having an output terminal configured to provide an output voltage which is regulated to an output target, the switch mode power supply has a first switch and a control circuit. When the output voltage increases to a first threshold voltage, the control circuit is configured to turn OFF the first switch until a time period expires.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: April 5, 2016
    Assignee: Chengdu Monolithic Power Systems Co., Lt.d
    Inventor: Qian Ouyang
  • Patent number: 9294093
    Abstract: An apparatus such as a level shift circuit includes a first signal output device configured to output a first level shifting signal, a second signal output device configured to output a second level shifting signal, and first and second detector devices. The level shifting signals are to control an output switching element of a high potential side of an output device that includes a power source and a load. The first and second detector devices are respectively configured to compare the first and second level shifting signals to a reference signal and output respective first and second comparison result signals. The first and second comparison result signals are configured to at least partly control switching of the first and second level shifting signals based at least in part on the presence of a parasitic resistance.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: March 22, 2016
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Masashi Akahane
  • Patent number: 9287779
    Abstract: The present disclosure includes systems and methods for 100% duty cycle in switching regulators. A switching regulator circuit includes a ramp generator to produce a ramp signal having a period and a comparator to receive the ramp signal and an error signal, and in accordance therewith, produce a modulation signal. In a first mode of operation, the ramp signal increases to intersect the error signal, and in accordance therewith, changes a state of a switching transistor during each period of the ramp signal. In a second mode of operation, the error signal increase above a maximum value of the ramp signal, and in accordance therewith, the switching transistor is turned on for one or more full periods of the ramp signal.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: March 15, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Ricardo T Goncalves, Troy Stockstad, Joseph D Rutkowski
  • Patent number: 9276473
    Abstract: A voltage converting controller is applied to a switching voltage converting circuit, in which the voltage converting controller periodically operates a high-side power switch and a low-side power switch in the switching voltage converting circuit with a high-side control signal and a low-side control signal, respectively, so as to convert an input voltage into an output voltage via an inductor. Defining an ideal duty cycle as the rating value of the output voltage divided by the value of the input voltage, when the ideal duty cycle is less than one threshold duty cycle, then the period of the high-side control signal is a constant; and when the ideal duty cycle is greater than the threshold duty cycle, the period of the high-side control signal and the period of the ideal duty cycle are positively correlated.
    Type: Grant
    Filed: January 7, 2015
    Date of Patent: March 1, 2016
    Assignee: RICHTEK TECHNOLOGY CORP
    Inventors: An-Tung Chen, Li-Wen Fang, Chih-Hao Yang, Yu-Chiao Hsieh
  • Patent number: 9274537
    Abstract: There is provided a regulator circuit capable of increasing the capacity of the output transistor for supplying current, stably generating an internal power supply voltage and adapting to the reduction of a power supply voltage. The regulator circuit includes an output transistor which is supplied with an external power supply voltage and supplies dropped voltage to an internal circuit, a differential amplifier for outputting a gate potential applied to the gate of the output transistor, a reference voltage generating circuit for supplying a reference voltage to the differential amplifier, and a cut-off transistor for turning off the output transistor to stop supplying power to the internal circuit. The output transistor is comprised of a depression NMOS transistor whose threshold voltage is a negative voltage. The regulator circuit further includes substrate potential control means for controlling the substrate potential of the depression NMOS transistor.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: March 1, 2016
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventor: Hiromi Notani
  • Patent number: 9263945
    Abstract: A constant on time control circuit, configured to control a converting circuit to transform an input voltage into a stable output voltage, is disclosed. The constant on time control circuit comprises a comparing circuit and a logic circuit. The comparing circuit compares a reference signal and a voltage signal indicative of the output voltage and accordingly outputs a compared result signal. The logic circuit periodically controls the converting circuit to perform voltage transformation and makes a time period of a duty cycle in every cycle being substantially constant. A start point in time of every cycle is determined according to the compared result signal. The comparing circuit comprises a differential pair, a base current source and an extra current source. The base current source provides a bias current to the differential pair. The extra current source provides a substantial ramp current to one channel in the differential pair.
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: February 16, 2016
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Li-Min Lee, Chao Shao, Shian-Sung Shiu, Quan Gan
  • Patent number: 9246388
    Abstract: An integrated circuit for converting a high voltage level to a low voltage level comprises a high side driver, a low side driver electrically coupled with the high side driver, a circuit electrically coupled with the high side driver and a first node between the high side driver and the low side driver, and a false signal filter electrically coupled with the circuit. The circuit is configured to substantially turn off the high side driver if the high side driver leaves a cutoff region of the high side driver during a tri-state mode. The false signal filter is configured to screen signals that are outside of the tri-state mode.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: January 26, 2016
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
    Inventors: Mei-Chen Chuang, Alan Roth
  • Patent number: 9246392
    Abstract: A controller for use in a power converter includes a drive circuit coupled to generate a drive signal to control switching of a power switch to control a transfer of energy from a power converter input to a power converter output. The controller also includes an input for receiving an enable signal including enable events responsive to the power converter output. The drive circuit is coupled to turn ON the power switch in response to the enable events and turn OFF the power switch in response to a power switch current reaching a current limit threshold. A current limit threshold generator is coupled to receive the drive signal from the enable events of the enable signal. The current limit threshold may be a ramp signal and the ramp signal along with the time between enable events may be used to modulate the drive signal.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: January 26, 2016
    Assignee: Power Integrations, Inc.
    Inventors: Balu Balakrishnan, Roland Sylvere Saint-Pierre, Giao Minh Pham, Lance M. Wong
  • Patent number: 9225242
    Abstract: An electronic control device includes a turn-on restriction section capable of performing a restriction operation to restrict a turn-on speed of a switching element. The turn-on restriction section includes a comparator. The comparator receives a voltage of a main terminal of the switching element connected to a smoothing circuit and determines whether the voltage of the main terminal of the switching element reaches a threshold voltage. The turn-on restriction section performs the restriction operation for a predetermined time from a start of a turn-on period in which the switching element is turned on. The turn-on restriction section stops the restriction operation after the predetermined time has elapsed. The predetermined time is set to a time from the start of the turn-on period until the voltage of the main terminal of the switching element reaches the threshold voltage.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: December 29, 2015
    Assignee: DENSO CORPORATION
    Inventors: Hiroshi Yamaguchi, Toru Itabashi, Kenichi Yashiro, Yuki Mikami
  • Patent number: 9209691
    Abstract: Systems and methods are disclosed to control a buck converter with a first switching circuit including a first upper power transistor coupled to a first lower power transistor at a first junction; a second upper power transistor coupled to a second lower power transistor at a second junction; an inductor coupled to the first and second junctions; and a load coupled to the second junction.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: December 8, 2015
    Assignee: Adaptive Digital Power, Inc.
    Inventors: Huy X. Ngo, Donald Wile
  • Patent number: 9209695
    Abstract: A DC-DC converter according to the present invention includes a power supply control circuit—that generates pulse signals, an output transistor that is controlled to be turned on and off based on the pulse signal, a rectification transistor—that is controlled to be turned on and of based on a control signal, a coil provided between a node between the output transistor and the rectification transistor, and an external output terminal, a comparator that compares a voltage of the node—with a reference voltage, a first control circuit that generates a control signal based on a comparison result of the comparator, and a second control circuit that generates the control signal based on a backward-current detection timing and a reference timing.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: December 8, 2015
    Assignee: Renesas Electronics Corporation
    Inventor: Yohei Ide
  • Patent number: 9197149
    Abstract: A motor drive apparatus comprises: a position signal generation portion that generates a position signal corresponding to a rotor position of a brushless DC motor; and a logic portion that when starting the brushless DC motor, disposes a non-energizing period immediately after starting forced commutation at a phase switchover timing corresponding to a predetermined forced commutation frequency and performs energizing control of the brushless DC motor such that usual commutation is started at a phase switchover timing corresponding to the position signal that is generated during an inertial rotation of the rotor.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: November 24, 2015
    Assignee: Rohm Co., Ltd.
    Inventors: Tetsuo Yamato, Noboru Takizawa
  • Patent number: 9182780
    Abstract: The present application discloses various implementations of a power management unit (PMU) suitable for use in a mobile device. In one exemplary implementation, such a PMU includes a gain control block configured to control an oscillator coupled to the PMU. The gain control block is further configured to control a clock output stage of the PMU. The PMU also includes a signal protection circuit coupled to an input of the gain control block. The signal protection circuit is configured to preserve clock signals produced by the clock output stage during a transition to a standby mode.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: November 10, 2015
    Assignee: BROADCOM CORPORATION
    Inventors: Xuezhen Wang, Russell Radke, Jay E. Ackerman
  • Patent number: 9141161
    Abstract: A voltage regulation apparatus comprises a plurality of individually switchable current sources coupled to an output for coupling the voltage regulation apparatus to an external load. The output is monitored using a bridge divider and a comparator. The bridge divider generates a feedback voltage, that is compared with a reference voltage, representative of a target voltage to be maintained at the output, when loaded. A digital sequencer unit is coupled to the comparator and responds to the comparator to increase or decrease a number of the plurality of individually switchable current sources activated, thereby causing a collective current generated by the activated number of the plurality of individually switchable current sources to converge on a load current, demanded by the external load.
    Type: Grant
    Filed: June 23, 2006
    Date of Patent: September 22, 2015
    Assignee: Freescale Semiconductor, Inc.
    Inventor: Eric Rolland
  • Patent number: 9130474
    Abstract: A power transforming apparatus implements a transformation of an energy signal and comprises a control unit, a pulse width modulation (PWM) unit, a transformation unit, and a slope compensation unit. The control unit outputs a target power signal. The PWM unit is coupled with the control unit and generates a switch signal. The transformation unit is coupled with the PWM unit, and implements a power transforming of the energy signal to output an energy transformation signal according to the switch signal. The slope compensation unit is coupled with the control unit and the PWM unit, and implements a slope compensation, according to the target power signal and a feedback signal, to output a compensation signal to the PWM unit. The switch signal is generated according to the target power signal and the compensation signal.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: September 8, 2015
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Yun-Chi Hung, Chih-Hung Hsiao, Cheng-Yu Lai
  • Patent number: 9123286
    Abstract: A power generator includes a booster that boosts an input voltage supplied from a power supply unit and that supplies a boosted input voltage to an output terminal, a selector that selects one of the input voltage and a voltage at the output terminal as a selected voltage and supplies the selected voltage as an output voltage, a reference voltage generator that generates a reference voltage based on the output voltage, a comparator that compares a feedback voltage supplied from the booster and the reference voltage with each other, and a controller that controls the booster to output a chosen voltage from the output terminal according to a comparison result of the comparator.
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: September 1, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Sung-Cheon Park
  • Patent number: 9112403
    Abstract: A method for regulating a clocked buck/boost converter, wherein a buck converter switching element is driven at a common clock frequency with a first pulse-width-modulated switching signal and a boost converter switching element is driven with a second pulse-width-modulated switching signal to convert an input voltage into a regulated output voltage, and a regulator signal from an output voltage regulator is used to generate the first and second pulse width modulated switching signals such that the buck converter is operated in a discontinuous mode with quasi-resonant switching, where the inductor current or the current through the buck converter switching element is detected and compared with a reference current, where the regulator signal is amplified to the extent that the reference current is reached, in terms of time, before a turn-off pulse of the first pulse-width-modulated switching signal, and where the second pulse-width-modulated switching signal is generated using the amplified regulator signal.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: August 18, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventor: Jalal Hallak
  • Patent number: 9079396
    Abstract: A method for driving a capacitive load using a target voltage waveform having a peak voltage and an average rise and fall slew rate, wherein the average rise and fall slew rates comprise at least one voltage step, the method comprising supplying power from an input to an output for charging a capacitive load to obtain a peak voltage and average rise slew rate in response to the target waveform; discharging the capacitive load to obtain an average fall slew rate in response to the target waveform, and returning the discharged power from the capacitive load to the input.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: July 14, 2015
    Assignee: Global Inkjet Systems Limited
    Inventor: Michael Penberth
  • Patent number: 9083236
    Abstract: The present invention refers to high-voltage generators, in particular to a step-down DC-to-DC converter circuit (buck converter) for supplying a DC output voltage Uout which may e.g. be used in a voltage supplying circuitry of an X-ray radio-graphic imaging system. According to the invention, the peak value of the buck converter's storage inductor current IL is controlled by a control circuit ?C? which regulates the on-time ?ton of a semiconductor switch S in the feeding line of this storage inductor L. As a result thereof, an output current sensor CS, which is commonly used in today's buck converter designs, becomes redundant.
    Type: Grant
    Filed: February 10, 2010
    Date of Patent: July 14, 2015
    Assignee: Koninklijke Philips N.V.
    Inventors: Wolfgang Rexhausen, Marc Maria Alex Bleukx
  • Patent number: 9077244
    Abstract: A DC/DC converter configurable for operating as a multiphase DC/DC. A controller produces a master drive signal for controlling a primary power switch to produce the output DC signal at a desired level. Multiple secondary power stages are coupled between the input and the output nodes for producing an output DC signal. Each of the multiple secondary power stages has at least one secondary power switch responsive to the input DC signal for producing the output DC signal. An expander system configures the DC/DC converter for operation in a multiphase DC/DC conversion mode. The expander system is responsive to the master drive signal for producing multiple slave drive signals respectively supplied to the multiple secondary power stages for controlling secondary power switches. The slave drive signals have phases shifted with respect to the master drive signal and with respect to each other.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: July 7, 2015
    Assignee: LINEAR TECHNOLOGY CORPORATION
    Inventors: Albert M. Wu, Xiaohua Su
  • Patent number: 9063194
    Abstract: A method and arrangement of determining starting conditions of a solar converter in a photovoltaic system. The photovoltaic system includes a photovoltaic panel system having one or more photovoltaic panels. The method includes determining an open circuit voltage of the photovoltaic panel system, and determining beforehand limit values for the starting conditions, where the limit values include an open circuit voltage value and a temperature value, with which values the solar converter can be started. The method also includes determining beforehand the temperature dependency of the open circuit voltage of the panel system, determining a temperature of the panel system, and setting a criterion for starting the converter. The criterion includes determining, by using the determined temperature dependency and the determined limit values for the starting conditions, whether the determined temperature and the determined open circuit voltage enable the starting of the converter.
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: June 23, 2015
    Assignee: ABB OY
    Inventors: Jesse Kokkonen, Janne Hellberg, Jari Uusimäki
  • Patent number: 9063557
    Abstract: An operational transconductance amplifier used in conjunction with a multiple chip voltage feedback technique allows multiple strings of LEDs and current sinks to be efficiently powered by a simple feedback oriented voltage regulator within an appliance. A connected series of differential amplifiers or multiplexors are used to monitor the voltages between the connected LEDs and the current sinks, in order to progressively determine the lowest voltage. The operational transconductance amplifier compares this voltage to a reference voltage and injects or removes current from the feedback node of a voltage regulator, thereby altering the voltage present at the feedback node. This causes the voltage regulator to adjust its output, ensuring that the current sinks of the LED strings have adequate voltage with which to function, even as the LEDs have different forward voltages and the strings are asynchronously enabled and disabled.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: June 23, 2015
    Assignee: ADVANCED ANALOGIC TECHNOLOGIES INCORPORATED
    Inventor: Kevin D'Angelo
  • Patent number: 9048686
    Abstract: A power supply system of the present invention aims to achieve optimization of the efficiency and therefore includes: z (z is a natural number equal to or larger than 2) power supplies (PS-1 to PS-z) connected in parallel; and a controller (8) for the number of power supplies in operation which controls the number of power supplies in operation among the power supplies (PS-1 to PS-z).
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: June 2, 2015
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Masayuki Yamadaya
  • Publication number: 20150145488
    Abstract: A method according to an exemplary aspect of the present disclosure includes, among other things, controlling a power supply system to avoid an over-voltage event across one or more switching devices of the power supply system, the controlling step based on switching overlap information that includes instructions for either advancing or retarding a switching signal associated with at least one of the switching devices.
    Type: Application
    Filed: November 25, 2013
    Publication date: May 28, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Arvind GOVINDARAJ, Jun KIKUCHI
  • Publication number: 20150145490
    Abstract: In one embodiment, a method of controlling a switching power supply can include: (i) generating an ideal on time signal according to an input voltage and an output voltage of the switching power supply; (ii) generating a ripple voltage signal having a predetermined constant value when a power switch of the switching power supply is on, and a linearly decreasing value when the power switch is off; (iii) generating a regulating voltage signal according to an output voltage sense signal and the ripple voltage signal; (iv) generating a regulating control signal by comparing the regulating voltage signal against a first reference signal; (v) generating an on time control signal according to the regulating control signal and the ideal on time signal; and (vi) generating a driving signal according to the on time control signal for driving the power switch.
    Type: Application
    Filed: November 18, 2014
    Publication date: May 28, 2015
    Inventors: Kailang Hang, Liangwei Sun
  • Publication number: 20150145492
    Abstract: A power supply control apparatus includes a first adder configured to generate a difference signal based on a target value and a feedback signal; a compensator having a first transfer function Wc(z) and configured to generate a control signal based on the difference signal; a control target having a second transfer function Wp(z) and configured to output an output signal generated in response to the control signal; a disturbance canceller having a third transfer function {l+Wc(z)·Wp(z)}/{Wc(z)·Wp(z)} and configured to generate a disturbance cancelling signal based on the output signal corresponding to a control amount y; a second adder configured to generate a differential disturbance signal based on an output of the first adder and the disturbance cancelling signal; and a filter circuit which generates the feedback signal based on the differential disturbance signal.
    Type: Application
    Filed: January 28, 2015
    Publication date: May 28, 2015
    Inventor: Hideyuki Takahashi
  • Publication number: 20150145489
    Abstract: In one embodiment, a zero-crossing detection circuit for a synchronous step-down converter, can include: (i) a state determination circuit configured to compare a drain voltage of a synchronous transistor of the synchronous step-down converter against a reference voltage, and to generate a state digital signal indicative of whether a body diode of the synchronous transistor is turned on; (ii) a logic circuit configured to convert the state digital signal into a counting instruction signal; (iii) a plus-minus counter configured to generate a numerical signal in response to the counting instruction signal; (iv) a DAC configured to generate a correction analog signal based on the numerical signal; and (v) a zero-crossing comparator configured to receive the correction analog signal and the drain voltage of the synchronous transistor, and to provide a zero-crossing comparison signal to a driving circuit of the synchronous step-down converter.
    Type: Application
    Filed: November 14, 2014
    Publication date: May 28, 2015
    Inventors: Jinzhao Hou, Chen Chen
  • Publication number: 20150145491
    Abstract: There is provided a power converter that is operated by using a power supply of one system and effectively using a current flowing in a load. A charging operation that supplies a charging current and the like to a load 13 and a discharging operation that outputs a discharging current from the load 13 are performed by switching each semiconductor switch of a full-bridge circuit 12. A control section 15 controls all semiconductor switches of the full-bridge circuit 12 to be in an OFF state while switching the charging operation and the discharging operation, makes an inertia current generated by energy accumulated in inductors 27 and 28 flow from a circulation diode of the semiconductor switch that is in OFF-state to a first connection point of the full-bridge circuit 12, and supplies the inertia current to a control power supply section 14 or a DC fan 16 by the reverse flow prevention diode 18.
    Type: Application
    Filed: November 21, 2014
    Publication date: May 28, 2015
    Applicant: TOYO SYSTEM CO., LTD.
    Inventors: Yutaka TOMIZAWA, Hiroshi FUKUSHIMA, Hideki SHOJI
  • Publication number: 20150145438
    Abstract: A variable resistance device may be used in a dimmer compatibility circuit to reduce power dissipation in an integrated circuit of the dimmer compatibility circuit. For example, the integrated circuit may include switches coupled to resistors external to the integrated circuit. The integrated circuit may operate the switches to commutate among the external resistors and select a voltage drop that reduces a voltage at a drain voltage of the switches. The reduced drain voltage reduces power dissipation in the switches and instead dissipates the power in the external resistors.
    Type: Application
    Filed: November 25, 2013
    Publication date: May 28, 2015
    Applicant: CIRRUS LOGIC, INC.
    Inventors: Alfredo R. Linz, Shatam Agarwal, Kan Wang
  • Patent number: 9041504
    Abstract: Polyphase converter, comprising a plurality of electrical phases (11 to 16), which can each be driven by switching means (21 to 26), wherein at least one coupling means (31 to 39) is provided, which magnetically couples at least one first phase (11) to at least one further phase (12, 14, 16), wherein at least two phases (11, 12) to be coupled are surrounded at least partially by the coupling means (31), wherein at least one insulating body (72) is provided, which on the upper or lower side thereof accommodates the phases (11 to 16) to be coupled and on which at least one fastening means (74, 76, 90) is provided, which interacts with at least one of the phases (11 to 16) for fastening purposes.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: May 26, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Wolfgang Helmreich, Roland Hellwig
  • Patent number: 9041366
    Abstract: A device (200) includes a circuit (202) and a driver stage (204) therefor. The circuit includes two sub-circuits (231 and 232). The driver stage includes switcher logic (206) that produces signals that control switching on and off of the sub-circuits. The switcher logic also produces other signals in advance of the signals that control the switching of the sub-circuits. The driver stage includes delay compensations circuits (221 and 222), coupled to the switcher logic and to the circuit, that produce timing signals for the switcher logic. The timing signals are closely aligned with moments that a changing voltage at a node between the sub-circuits passes through threshold voltages. The timing signals compensate for all delays of signals through the device such that a period that both sub-circuits are off is minimized, while ensuring that both sub-circuits are not on at a same time.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: May 26, 2015
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Ivan Carlos Ribeiro Nascimento, Andre Luis Vilas Boas
  • Patent number: 9041378
    Abstract: Systems and methods that provide control circuits having multiple sub-control inputs that control operation of a power electronics device (e.g., a power converter). Each of the multiple sub-control inputs are output from a separate sub-control circuit that includes a feedback circuit having an input tied to a common control node. The common control node is coupled to an input of a controller (e.g., a PWM controller). Outputs of each of the sub-control circuits are coupled to the common control node by a respective switch (e.g., diode, transistor, etc.) so that each of the sub-control circuits may be selectively coupled to the common control node to provide a control signal to a controller. Since components of each of the feedback compensations circuits are biased at a regulation voltage instead of a higher power supply voltage, the control circuit may switch between control modes with minimal delay.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: May 26, 2015
    Assignee: CRANE ELECTRONICS, INC.
    Inventors: Cuon Lam, Sovann Song, Khoa Nguyen
  • Patent number: 9041362
    Abstract: The invention relates to a system for eliminating current surges that includes a first voltage regulator (7) having a current limit programmable to a value (I(limit)) that depends on the value of the intermittent current surges (IO(surge)) required by the intermittent load (3) and the relationship thereof to the work cycle, a second voltage regulator (9), a condenser (4) connected between the first and second regulators (7, 9), that loads when the current is no longer required and that unloads when there is a need for output current to provide current to the second regulator (9) which absorbs the changes in voltage produced by the loading/unloading of the condenser and provides a constant voltage for any value of the required output current surge, independently of voltage changes in the condenser (4), and a control loop between a sensor for the output current provided to the load and an input limit (15) for the input current (II) in the first regulator (7).
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: May 26, 2015
    Assignee: UNIVERSIDAD DEL PAIS VASCO—EUSKAL HERRIKO UNIBERTSITATEA
    Inventors: Jose Miguel De Diego Rodrigo, Jose Ignacio Garate Añibarro
  • Publication number: 20150137777
    Abstract: A voltage conversion circuit is disclosed. The voltage conversion circuit comprises an energy-storing inductor, an N-type transistor, a P-type transistor, a current comparator, a multiplexer, a first driver and a second driver. When load connected to the voltage conversion circuit is a light load, the P-type transistor will be switched off so as to avoid generating a switching current and the switching current flowing gate-source and gate-drain parasitic capacitor of the N-type transistor is generated from an input voltage. The number of N-type transistor and switching frequency also decrease accordingly so that voltage conversion efficiency of the voltage conversion circuit may be increased.
    Type: Application
    Filed: January 29, 2014
    Publication date: May 21, 2015
    Applicant: ANPEC ELECTRONICS CORPORATION
    Inventor: CHIH-NING CHEN
  • Publication number: 20150137776
    Abstract: A DC-DC converter transitions between continuous conduction mode (CCM) and discontinuous conduction mode (DCM) without causing any overshoot or undershoot deviation output voltage. The DC-DC converter operates in a PWM mode in CCM. During DCM, it skips PWM pulses when a sustained negative current is detected in an output inductor. The current sensing is achieved by sampling and integrating a voltage, the sign of which is inverse to current direction. The sample and hold and integrator circuits are small, simple, and scale to high frequencies. The pulse skipping circuit automatically adjusts the duty cycle of power pulses to force a zero inductor current at the end of each pulse.
    Type: Application
    Filed: November 21, 2013
    Publication date: May 21, 2015
    Applicant: STMicroelectronics International N.V.
    Inventors: Matthieu Thomas, Bohumil Janik, Ondrej Tlaskal
  • Publication number: 20150137778
    Abstract: According to one embodiment, a DC-DC converter includes a comparator circuit that compares a feedback voltage of an output voltage with a reference voltage and a control circuit that controls an output voltage based on an output signal of the comparator circuit. The comparator circuit performs a discrete-time operation in response to a clock signal, and a frequency of the clock signal is adjusted according to a load condition.
    Type: Application
    Filed: September 5, 2014
    Publication date: May 21, 2015
    Inventor: Takayuki Miyazaki
  • Patent number: 9035627
    Abstract: A switched mode power supply includes a first switch, a second switch, an inductor, an output capacitor, and a driving circuit for driving the first switch and the second switch. The driving circuit is electrically coupled to a node between the first and second switches.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: May 19, 2015
    Assignee: Intel Mobile Communications GmbH
    Inventors: Hans Herzog, Sami Sipilae, Nikolay Tchamov
  • Patent number: 9035638
    Abstract: A DC/DC converter arrangement includes an input terminal to receive a supply voltage, an output terminal to provide an output voltage and a switching arrangement, including a coil and at least two switches to provide a Buck-Boost conversion. The arrangement further includes a current detection circuit which is coupled to the switching arrangement for sensing a coil current and a comparator, including a first input which is coupled to the output terminal and a second input which is coupled to an output of the current detection circuit. An output of the comparator is coupled to the switching arrangement. Furthermore, the arrangement includes a ramp generator which is coupled to the first or the second input of the comparator.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: May 19, 2015
    Assignee: ams AG
    Inventor: Pramod Singnurkar
  • Patent number: 9035640
    Abstract: A controller used in a buck-boost converter includes a clock generator, an error amplifying circuit, a comparing circuit, a proportional sampling circuit, a logic circuit, a pulse width increasing circuit, first and second driving circuits. Based on a clock signal generated by the clock generator, the proportional sampling circuit samples the difference between a current sensing signal and a compensation signal generated by the error amplifying circuit, and generates a proportional sampling signal. The pulse width increasing circuit generates a sum control signal based on the proportional sampling signal and a logic control signal generated by the logic circuit, wherein a modulation value adjusted by the proportional sampling signal is added to the pulse width of the logic control signal to generate the pulse width of the sum control signal. The first and second driving circuits generate driving signals based on the sum control signal and the logic control signal.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: May 19, 2015
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Chenggang Deng
  • Patent number: 9035626
    Abstract: A switching circuit for extracting power from an electric power source includes (1) an input port for electrically coupling to the electric power source, (2) an output port for electrically coupling to a load, (3) a first switching device configured to switch between its conductive state and its non-conductive state to transfer power from the input port to the output port, (4) an intermediate switching node that transitions between at least two different voltage levels at least in part due to the first switching device switching between its conductive state and its non-conductive state, and (5) a controller for controlling the first switching device to maximize an average value of a voltage at the intermediate switching node.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: May 19, 2015
    Assignee: Volterra Semiconductor Corporation
    Inventors: Anthony J. Stratakos, Michael D. McJimsey, Ilija Jergovic, Alexandr Ikriannikov, Artin Der Minassians, Kaiwei Yao, David B. Lidsky, Marco A. Zuniga, Ana Borisavljevic
  • Publication number: 20150130429
    Abstract: A feeding apparatus feeds an electric power to an object to which the electric power is fed. The feeding apparatus includes a DC/DC converter and a driver. The DC/DC converter outputs a PWM signal. The driver feeds the electric power to the object to which the electric power is fed in accordance with the PWM signal. The DC/DC converter outputs a prescribed voltage value during a Tri-State shift.
    Type: Application
    Filed: November 10, 2014
    Publication date: May 14, 2015
    Inventor: Yutaka Horie